Original insulation trade vintage catalog for THE CELOTEX CORPORATION, was located in Chicago, IL. Manufacturers of Insulating Cane Board Products, Thermax Fire-Resisting Insulating Slabs. World's largest manufacturer of structural insulation. Products and Uses, Specifications, Description and Characteristics provided. Hard Board, Sheathing, Traffic Tap, Plaster Base, Slabs and more. Unbound from a large 1938 architectural catalog, this unique old fifty-six page technical specifications brochure would exhibit beautifully matted and framed. A fantastic addition to your retro insulation collection. Pages are detached and may contain a small amount of residual glue on edge.